Hi @MobiTowner,
Where do you want to create your calendar event?
Could you please share a screenshot of your flow’s configuration?
Further, do you want to add one day or 24 hours based on end date?
I agree with @faustocapellanj’s thought almost, you could also take an alternative way to achieve your needs. I have made a test on my side and please take a try with the following workaround:
Within Start time field, type the following formula:
formatDateTime(triggerBody()?['Start_x0020_Date'],'yyyy-MM-ddT00:00:00Z')
Within End time field, type the following formula:
formatDateTime(addDays(triggerBody()?['End_x0020_Date'],1),'yyyy-MM-ddT00:00:00Z')
Note: I have made a test to create a Google calendar event on my side.
The flow works successfully as below:
Best regards,
Kris